Design of electromechanical switch based on armchair twisted graphene nanoribbons with doping and defect
| Autor: | Hamed Lashgari, Somayeh Fotoohi, Mansoureh Pashangpour |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Condensed matter physics Doping chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials chemistry Impurity Vacancy defect 0103 physical sciences Nano Density functional theory Overall performance Electrical and Electronic Engineering 0210 nano-technology Boron Graphene nanoribbons |
| Zdroj: | Physica B: Condensed Matter. 569:48-56 |
| ISSN: | 0921-4526 |
| Popis: | The electronic transport properties of twisted armchair graphene nanoribbons (T-AGNRs) with substitution of boron (B)/nitrogen (N) impurity as well as single vacancy (SV) are investigated using density functional theory in combination with non-equilibrium Green's function (NEGF).The results exhibit that the electronic transport properties of T-AGNRs can be clearly modulated due to the presence of B/N doping or SV. For all considered systems, the maximum variations of current are observed under twisted angle θ = 180° respect to θ = 0°.Thus, these systems can be considered as electromechanical switch. Furthermore, the performance of switches is investigated with B/N doping and SV in different sites of T-AGNRs. Besides, the effects of different concentrations (0.9%, 1.8%, 2.7% and 3.6%) of doping and SV are studied on overall performance of switches. The results indicate that the performance is significantly enhanced by increasing of B/N concentration. Our findings might be important to design of nano electromechanical switch devices. |
| Databáze: | OpenAIRE |
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